G25.4 ICD-10-CM Code: Drug-induced chorea
G25.4 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Extrapyramidal and movement disorders (G20-G26)
G25.4
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceDrug-induced chorea
Involuntary, irregular, flowing movements of the limbs caused by medications, most commonly antipsychotics or stimulants.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for G25.4. Check the code and parent instructions in the Code Book.
Excludes 2
Official- certain conditions originating in the perinatal period (P04-P96)Inherited from G00-G99, G25
- certain infectious and parasitic diseases (A00-B99)Inherited from G00-G99, G25
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from G00-G99, G25
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from G00-G99, G25
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from G00-G99, G25
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from G00-G99, G25
- neoplasms (C00-D49)Inherited from G00-G99, G25
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from G00-G99, G25
- sleep related movement disorders (G47.6-)Inherited from G00-G99, G25
Related Codes
Includes
OfficialNo Includes notes are included in this display for G25.4. Check the code and parent instructions in the Code Book.
Excludes 1
OfficialNo Excludes 1 notes are included in this display for G25.4. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for G25.4. Check the code and parent instructions in the Code Book.
Use Additional
Official- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Code Also
OfficialNo Code Also instructions are included in this display for G25.4. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is G25.4 an HCC code?
No. G25.4 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- G25.4
- Description
- Drug-induced chorea
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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What This Code Means
G25.4 is the ICD-10-CM diagnosis code for drug-induced chorea. Involuntary, irregular, flowing movements of the limbs caused by medications, most commonly antipsychotics or stimulants. G25.4 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering extrapyramidal and movement disorders (g20-g26).
G25.4 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Always document the specific medication causing the chorea in the medical record.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for G25.4 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.